Bottle cap



Dec. 25, 1928. 1,696,742

R. w1 voN sYDow BOTTLE CAP Filed Aug. 23, 1926 o o INVENTOR f o G o BYFua/a/r W ;fon ydaw FIE-E- Hl ATTORNEY BUDOLF .Pasma Dee 25,1928. I

UNITED sTA Wit. -vru sYnoW, or GLENDALE, :cALIroRNI vAssleiron or ONE-mma' To 3 EDWABD G. BURGHABD, or Los ANGELES, onmi'cienia.A

BOTTLE car.

x Application flled August 23, 1926. Serial No. 180,962.

Thisinventionv ryelates to av cap forbottles, an especially to paper caps adapted to serve as a coverin'g for large -mouthedbottles, such as milk or creaml bottles;

Milk bottles are now quite conmmonly provided with'pasteboard o`r paper disks, for serving as a stopper'. This disc isretained by 'friction against'the inner wallsJ of the bottle neck, and rests on a shoulder therein. It is commonly known that such a cap is hard storemovefwhen it is desired to. pour from the bottle; and the likelihood is.

that when so removed, it is either torn or twisted to such an. extent that it cannot again serve efliciently as a'cap. Since 'the housewife often has occaslon to storeaway bottles only partly filled, the impracticability of utilizing the cap for the bottle often results in it bein left oif entirely, with consequent danger 0% contamination of the milk.

That danger, of course, is also present when taking the cap off for it often happens that the cap is jammed .down into the neck of the bottle and into the milk, and must be recovered by the fingers or othermeans.

I am aware that various'other kinds of caps have been suggested to overcome these disadvantages; for example, metal caps, such are used. But these are expensive and difficult to replace. Still another kind of cap has a flange that rests over the bead at the .bottle mouth; but this form requires special bottle with substantially the same bottlingh apparatus as is now in common use.

It |is sometimes desired, in connection with certified milk, to provide a cap or cover that cannot readily be removed without tearing or permanently altering the appearance of the'cap, Whereby a purchaser is assured that when milk is purchased with such a cap intact, it has not been tampered withby unauthorized persons. It is still another object of my invention to provide a cap forcertified milk bottles that has all these advantages, and yet can be produced at little more expense than the ordinary disk-like closure. l

It is still another object of my invention to provide a bottle cap that ,is held in place by suction, as by the provision of a. series of depressions, s'erving as vacuum cups cooperating with the upper surface of the head around the bottle'mouth.

My invention possesses many other advantages and has other objects which may be made more easily apparentfrom a consideration of several 'embodiments of my invention. For this purpose I have shown a few forms in the drawings accompanying and forming part of. the present specification. I shall now'proceed to describe these forms in'detail7 which lillustrate the. general principles of my invention; but it is to be understood that this detailed description is not to be taken in a limiting sense, since y proper sealing relation with a milk bottle; as are in common use for beverage bottles F ig. 2 is a top plan view thereof; Fig. .3 is a side elevation of a cap for cer-` tified milk bottles, embodying my invention, and shown as linstal'led on a bottle;

Fig. 4 is a bottom plan view'of the cap |shown in Fig. 3; and

Fig. 5 is a partial development, showing the form of blank that ma be used for making the cap ofFigs. 3 an 4,

In Fig. 1, I show a bottle 11, having the usual bead or enlargement 12 at the mouth. Inside the month there is a narrow shoulder 13, upon which usually rests the old form of disc-like closure or cap. Thelmouth of the bottle 11 forms the interior Vertical surface 14.

In 'accordance with my invention, the cap 15`is made of readily pliable material that nevertheless has some stiffness; Stiif paper or pasteboard is admirably suited for this Purpose. It has a central disc-like portion 16, arranged to rest at its edge on shoulder 13, .as well as an annular groove forming flange 17,` extending up, above the portion 16.' The groove formed thereby conforms withthe top ofvbead 12, fitting over it closely. A vdepending flange '18 serves to define the groove."

The cap 15 can be inserted in the bottle mouth and pressed into place by the aid of a plunger, Operating not only upon the inner 'disc-like portion 16, but also upon the flange 17. One of the important features of 1 my invention resides in the rovision of a supplementary disc 19 of sti paper or the like, whichl tiglitly fitsinto the round space, above portion16 and defined by `flange 17. This disc actually takes the brunt of the. force seating the cap 15 011 shoulder 18, and pre order further to ensure a tight seal,"I provide a series of' small deprcssions 20 in'the flange 17, arranged to cooperate with the surface of bead 12 as vacuum cups. Thus when securely attached, the depressions 20 serve by air pressureto retain the cap 15 in close contact with the bead. Due to the f provision of a number of such cups,4=,ight- 'slightly loosen it.

ness is yet' maintained evenfif one or two' of them fail to retain their air tight quality. The cap being made frpm readily conformable material, it is a simple matterto ensureV ;hat these cups 20 will function in the desired manner.

In order to remove the cap 15, it can be turned relative to bottle 11, which will can again be turned while pressed against the bottle mouth. In this manner, the closure To replace the cap, itv

can be made suificiently tight for the needs ofl the average household.

In Fig. 3 I show a cap 21 having substantially the same' characteristics asV cap 15, except thatit cannot readily be removed 'without tearing it or altering its appearance,

hus making it adaptable for use in connection with certified milk. The cap 21 has an outer flange 22 that closely embraces the outside of bead 12 and curves inwardly around the lower portion of the bead. Thus to take'the cap 21 off, it'is necessary to ltearv it off.

In order to get sition, `it is made as shown most clearly in Fig. 5; in this figure, it is seen that flange 22 is formed by Ithe aid of a series of strips 23, shown flattened out except in ,the upper right hand corner. The adjacent edges of the strips 28 have fiaps 24:, which are arranged to `be fastened-together as by clips 25 after the stripsV 23 are bent to form the flange 22 and are in place on the bottle. i Of the cap 21 on in this poi course other schemes for forming the flange 22 could be used.

I claim: '1. In a bottle cap, closure, and a flange therefor arranged to means forming cover the edge of the 'bottle opening, said flange having a plurality of small depressions therein forming vacuum cups to hold the cap in place when applied to the opening.

2. In a bottle'cap, a covering member arranged to rest at its edges against a shoulder in the mouth of a bottle, a flange for said rhember forming an annular vgroove accommodating the edge of the ,bottle mouth, said flange having one orI more depressions to form vacuurn` cups to hold the cap in place to said edge, and a disc placed over the covering member and held within the flange.

In testimony whereof I have hereunto set my hand. i

' BUDOLF WM. voN SYDOW. 

